Many different build tools and Java IDEs use public Maven repositories to download dependencies. This page lists the Maven repositories where Clojure and contributed libraries may be found, and how to configure them in different build tools.

Leiningen Quick Start

To use Clojure and contrib library releases in your Leiningen project, there's nothing special to do. Just add dependencies in project.clj

To use Clojure and contrib library SNAPSHOTS in your Leiningen project, add the following to your project.clj:

A note about releases versus snapshots

Releases have fixed version strings, like 1.2.0 or 1.3.0-alpha5. Once it has been uploaded to a public repository, a release never changes.

Snapshots have version strings ending in -SNAPSHOT. Typically, snapshot version strings look like 1.1.0-SNAPSHOT, although Clojure the language adds the name of the git branch, like 1.3.0-master-SNAPSHOT. Snapshots are like tracking the latest version of a project in source control: they can change.

When a snapshot is uploaded to a public Maven repository, the -SNAPSHOT in the version string is replaced with a unique timestamp, so 1.3.0-master-SNAPSHOT would become something like 1.3.0-master-20110408.150223-52.

If you use a -SNAPSHOT version in your project dependencies, most Maven-based tools will automatically check for updated versions of that snapshot. (Maven itself allows you to disable this behavior with the -o option.) To pin your dependency at a specific snapshot version, use the full version string with the timestamp.

How to configure release repositories

Nothing to do here. Maven-based tools, including Leiningen, always check the Maven Central Repository for releases.

It takes up to 24 hours for a new release to be sync'd from the Sonatype repository to Maven Central. If you want to get a new release sooner, use the same instructions as for snapshot repositories, below.

Historical Notes

Monolithic "clojure-contrib" after 1.2.0

After the 1.2.0 release, clojure-contrib was split into multiple sub-modules. This proved even more cumbersome than the monolithic clojure-contrib, and is being phased out. There is no plan to release clojure-contrib post-1.2.0 in either monolithic or modularized forms.

Instead, new development of "contrib" libraries is occurring in independent Git repositories. Each library can have its own version and release cycle, independent of Clojure. Snapshots and releases of these "new contribs" are uploaded to the public repository at oss.sonatype.org and sync'd to Maven central just like Clojure itself.